feedback loop

Hi everyone, I have the following situation. A coworker and I share the same office and we have had a conference call with several other participants (all others were in other locations). Both of us used our respective laptops. However, I used earphones (just the ordinary ones, with no mic)...

I have a pair of headphones with two 3.5mm jacks, they allow me to listen to audio from two different sources at once. I also have a KVM (sort of) that lets me switch between my work computer and home computer at the click of a button. My goal: To be able to listen to audio from my work...